Flue-expander.



No. 843,865. PATENTED FEB. 12, 1907.

.J. P. BROWN.

FLUE EXPANDER.

APPLICATION FILED SEPT. 28, 1906. I

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FLUE-EXPANDER.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed September 28, 1906. Serial No. 336.606.

To all w/wm, it may concern.-

Be it known that I, Josnrn F. BROWN, a citizen of the United States, residing at Bristol, in the county of Sullivan and State of Tennessee, have invented a new and useful F hie-Expander, of which the following is a specification.

This invention relates to fiue-expanders; and its object is to provide a device of this character of simple and inexpensive construction, and which can be quickly adjusted so as to produce a desired expansion of a tube, said expansion, however, being limited by means provided for that purpose.

ith the above and other objects in view the invention consists of certain novel features of construction and combinations of parts, which will be hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings is shown the preferred form of the invention.

In said drawings, Figure 1 is a side elevation of the flue-expander with parts broken away. Fig. 2 is a transverse sectional view of the same cut on the line 2 2 of Fig. 1; and Fig. 3 is a transverse sectional view of the same out on the line 3 3, Fig. 1.

The expander comprises a tubular body 1,

.which is provided in its sides with three longitudinally-extending apertures 2. The exterior of the body 1 is screw-threaded, as at 3. The conical rollers 4 fit within the apertures 2. The diameter of the said rollers 4 is slightly larger than the width of the said apertures at their inner ends, so that the said rollers may not pass entirely through the said apertures, but may become seated in the same, so that the outer sides of said rollers are within the arc of the circle described by the surface of the body 1. One side of the body 1 is provided with the indicating-line 5. The collar 6 is internally screw-threaded, and is adapted to receive the thread 3 of the body 1. The said collar is provided with an indicator 7, the function of which will be hereinafter explained. The said collar 6 is also provided in its inner wall with the recesses 8, the said recesses 8 corresponding 1 in numbers to the number of rollers 4 employed. The sleeve 9 is also internally screw-threaded and is provided with the recesses 10. The said sleeve is adapted to receive the end of the body 1 and is intended to bear against the rear edge of the collar 6 and serve as a jam-nut in retaining the said collar in position upon the body 1. A conical mandrel 11 fits between the rollers I 4 and is passed longitudinally between the said rollers in such a manner as to project the outer surfaces of the latter beyond the outer wall of the body 1. The said outer surfaces of the said rollers 4 are projected and properly loacted and supported for the purpose of expanding the tube. (Not shown.)

From the foregoing description it is obvious that the collar 6 may be adjusted longitudinally of the body 1 in order to expand the tube at such depth or length as may be necessary or desired, and that by turning the indicator 7 into alinement or register with the indicator 5 the recesses of the said collar 6 are properly positioned with relation to the aper- I tures 2 of the body 1 and permit of the proper lateral projection of the rollers 4 when the mandrel 1 1 is inserted between the same. It is of course understood that the lateral movement of the rollers will be reduced in proportion to the distance that the collar 6 extends over the rollers. Obviously where the collar only surrounds the small ends of the rollers the lateral movement of said rollers is greater than where the collar is adjusted so as to extend around the intermediate or larger portions of the rollers.

The preferred form of the invention has been set forth in the foregoing description, but I do not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of the claims.

What is claimed is 1. A flue-expander comprising a tubular body having elongated apertures therein, said body being externally screwthreaded, a collar adapted to be screwed upon the body, 1 a sleeve adapted to be screwed upon the body and against the collar, said sleeve and collar having interior grooves, tapered rollers seated within the apertures and projecting into the grooves, and a mandrel insertible into the l body for forcing the rollers laterally.

2. A flue-expander comprising an externally-screw-threaded body having elongated openings arranged longitudinally therein, tapered rollers mounted within the openings, a collar screwed upon the body and having interior grooves adapted to receive the rollers,

l interior grooves adapted to receive the rollers,

a sleeve screwed upon the body and having.

said sleeve being adapted to abut against the collar, and means insertible into the body for moving the rollers laterally and into the grooves.

8. A flue-expander comprising an externally-screW-threaded body having elongated openings arranged longitudinally therein, tapered rollers mounted Within the openings, a collar screwed upon the body and having interior grooves adapted to receive the rollers, means insertible into the body for moving the rollers laterally into the grooves, said lateral movement'being varied by the adjustment of the collar, means upon the body and collar for indicating When the grooves and IS the openings register and a sleeve screwed upon the body and adapted to abut against and lock the collar.

In testimony that I claim the foregoing as my own I have hereto affixed my signature 20 in the presence of two Witnesses.

JOSEPH F. BROWN. 

